clement



(No Model.) 2 Sheets-Sheet 1.

F. H. CLEMENT.

BAND SAWING M-AGHINE.

No. 301,095. Patented July 1, 1884.

mfvzesses: 944 firm/5W 2 +0 8 mm .M H 8 6 h S 2 T N E M E L O H L (NoModel.)

BAND SAWING MACHINE.

No. 301,095. Patented July 1,1884.

Il liuul Illlllll'l u mwezzio 7":

minesses:

N. PETERS. Pholoillhogmpher. Washington. D, c.

NrrEn STATES PATENT Enron.

FRANK H. CLEMENT, OF nocHEsrEn, NEW YORK.

BAND SAVVENG lt lACt-MNE.

SPECIFICATION forming part of Letters Patent No. 391,095, dated July 1,1884:. Application filed Angustll, 1883. (No model.)

To ctZZ 1071,0172, it may con/007% Be it known that I, FRANK I-I.CLEMENT, a citizen of the United States, residing at Rochester, in thecounty of Monroe and State of New York, have invented a new and usefulImprovement in Band Sawing Machines, of

. which the following is a specification referarms extend ence being hadto ings, in which Figure 1 is a sectional side elevation of the upperportion of aband sawing machine with my improvements attached. Fig. 2 isa plan View of the same. Fig. 4 is asectional elevation at right anglesto Fig.1 at the line :0. Figs. 6 and 7 are elevations of theblade-guide, drawn to a larger scale. show details.

The nature and objects of my invention will appear in the subjoineddescription.

A is a hollow column, which is suitably secured to the main frame C, andis provided with ways a for the attachment of the sliding bearing B b ofthe upper saw-wheel in the usual manner. 1, 2, and 4, is threaded into anut attached to the plate I), Fig. 2, and is shouldered into the sleeve6, Figs. 1, 2, and 4, its lower extremity carrying a hand-wheel orcrank, f. The sleeve 6 is fitted to slide easily in asocket, c, securedto the lower part of the column A, andis provided with lugs orknife-edge bearings h on opposite sides, as is more fully shown in Figs.3 and 4.

D is a lever bifurcated at one end, as shown in Fig. 3, to embrace thesleeve 6, and its past the latter, so as to be pivoted at g, Fig. 1, toa projecting lug on the column A. The long arm of the lever 1) extendsunder the main frame 0, and is connected at its extremity by a suitablelink or red, (Z, to aspring, K, (which Iprefer to make in the formshown,) secured at one end to the frame C.

E, Figs. 1, 3, and 8, is a tubular case, so cured to the frame 0, andthrough its core the rod (2 and end of the lever D pass, the latterentering it through a slot in one side. Upon the accompanying drawtheside of the case E, facing the operator, a scale is provided, as shownin Fig. 8, over which an index, j, moves, which is secured to the leverD. This scale maybe laid off for pounds or for widths of desired.

Figs. 3, 5, S, and 9.

The strainingscrewc Fi s.

saws, or for both, as

From the above it will be seen that while the screw 0 is free to movethe slide b up and down for various lengths of blades, as soon able formof spring may be used in place of the one shown, and a lever withoutbifurcation receiving the strain through one knifeedge h, would operatein a similar manner; but I prefer the construction shown.

Theadvantagesof this tension device are that the operator canalwaysseetheamount of strain on the blade and regulate it without movingfrom his post. The strain is always elastic for any width of blade. Anunwieldy counter-weight is avoided, as-well as the common tendency tooverstrain narrow blades by neglect in adjusting the weight. The upperbearing,- B, is pivoted to the slide 1) byastud, 7a, or in any suitablemanner; and in order to adjust the bearing laterally to the wheel, Iprovide a rod, Z, Figs. 2, 4, and 5, threaded at its upper end to lit anut, m. This nut is really the bead of a screw which is threaded intothe box a is asimilar screw threaded into a projecting arm on the slide1). The rod Z is shouldered into n, and a pin or other equivalent deviceis provided on the opposite side of a to prevent end motion. As the rodZ is turned by means of a crank or handwheel in reach of the operator,the box 13 will be adjusted about the center 76, mand a swiveling intheir screw-bearings suflieiently to' allow such movement withoutcramping the rod Z. Instead of m and a being screws, they may have plainround shanks riyeted or otherwise secured in their seats loosely, so asto allow the necessary oscillation.

G G is a hollow socket, either cast with the frame C or bolted thereto.This socket is divided or split vertically (as indicated at 2, Fig. 2)011 one side only, and is made in two sections longitudinally, separatedfrom each other as to about one-half their circumfen once, but formedtogether as to the other half. The guide-spindle M is provided withlongitudinal rabbets or grooves, as shown in Fig. 2, and the sections GG, of the socket may be recessed and filled with soft metal, asdescribed in my Patent No. 219,148, dated September 2, 187 9; or theymay be bored out and provided with a pin or spline, to prevent axialmotion of the guide-spindle.

J is a clamp-wheel threaded to receive the cap-screw t, and t is acap-screw passing through lugs on the section G, and is either providedwith a nut or is threaded into one lug. The wheel J is used to clamp theguidespindle in any desired vertical position, while the screw 13 can beso adjusted as to prevent the guide-spindle and guide from suddenlyfalling when the clamp G is slacked, the frietion produced bycompressing the section G being practicallya counter-balance therefor.It will be seen that the sections G G are independent, so far as theclamping of the spindle M is concerned, but assist each other in holdingthe latter firmly by being cast in one piece.

I, Figs. 1, 2, 6, and 7, is a casting supporting the parts of myimproved guide; and I is a shank, by which it is adjustably attached tothe spindle M in any suitable manner.

II is a disk of hardened steel, fitted loosely between the lugs r 1",projecting from the face of the casting I. The back of this disk restsagainst a V-shaped ledge, 0, located at (or nearly at) right angles tothe path of the saw-blade.

F are the side guides, of wood or other suitable material, cut to fitbetween the lugs r 1". These side guides are beveled on their upper andlower edges, and are clamped in position by set or thumb screws 8, whichare threaded into the lugs r, at right angles to the above-mentionedbeveled edges. Lugs 19, projecting a little forward of the surface ofthe disk H, prevent the guides F from pressing against the latter, and,if desirable, an additional lug may project through the central openingin the disk for the same purpose. Thus it will be observed that the diskH is independent of the side guides, and will adjust itself to a fullbearing against the back ofthe blade, while at the same time it may berevolved'to a new position when abraded or grooved by the action of thelattea, or reversed and used upon the other si e.

N is an oil-cup, into which a wick, L, is introduced, so as to projecttherefrom, and just touch the back of the blade. The vertical portion ofthe cup is intended to be kept full of oil. The wick thus providessufficient oil to lubricate the back of the blade, but not so much as tobe carried around to the wheels and destroy their rubber covermgs.

It will be seen that the fastenings of the side guides can bemanipulated without the use of awrench, and are above and away from thework, so as not to interfere with following lines thereon.

For convenience, the side guides may be thinned down at one end fornarrow blades, as indicated in Fig. 2, and where it is desired to use awide blade they can be reversed, the other end being left fullthickness, as shown.

' hat I claim as my invention is- 1. In a band sawing machine, thecombination of the upper wheel-bearing and its adjusting-slide, abalance-lever, the pivotingpoint of which is stationary, and a blade-.straining screw threaded into the adjustingslide, and suitably fulcrumedon said balancelever, whereby the strain of the blade is received by thelever through the screw and conveyed to a counterbalaneing-springattached to the long arm of said lever, substantially as and for thepurposes set forth.

2. In a band sawing machine, the combination of the upper wheel-bearing,its sustaining and adjusting screw, a balance lever and spring arrangedto receive the strain of the blade, and an index-plate for showing theamount of such strain, substantially as set forth.

3. In a band sawing machine, the combination of the upper wheel-bearing,its adjusting and sustaining screw, .a balance-lever arranged to takethe strain of the blade, and a sleeve or collar shouldered upon saidscrew, and provided with knife-edge bearings 'resting upon thebalance-lever, constructed to operate substantially as described.

4. The combination of the pivoted wheelbearing B and itsadjusting-slide, the tilting screw Z and its nut and bearing m a, bothof which latter are made to swivel, essentially as described, wherebythe-swing of the upper wheelbearing while'being tilted does not crampthe screw Z, substantially as set forth.

5. In a band-saw guide, the combination of a knife-edge bearing locatedon the body of the guide at right angles, or nearly so, to the face ofthe blade, and a loose bearing-plate for the back of the latter,suitably supported in the body of the guide and resting against theknife-edge at or near the center of its rear face, whereby saidbearing-plate adjusts itself to the angular path of the blade,substantially as described.

6., In aband'saw guide, side guide-blocks beveled upon their upper edgeand arranged to. be clamped by suitable screws bearing upon the bevelededge, whereby the clamp screws are removed from a position near the workbeing sawed, for the purposes set forth. 7. In a bandsaw guide, aself-adjusting back plate, H, and side guides, F, in combination withlugs 1), formed on or secured to the body of the guide, substantially asand I for the purposes set forth. 7

FRANK II. CLEMENT.

WVitnesses:

J. E. McKELvEY, J ACOIB SPAHN.

